Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

First Impressions of Hydroboost

Discussion in 'The Garage' started by broc944, Sep 28, 2006.

  1. broc944

    broc944 1/2 ton status

    Joined:
    Sep 23, 2005
    Posts:
    1,660
    Likes Received:
    0
    Location:
    Northern Minnesota
    Just went for my first test drive after installing my Hydratech Level III Hydroboost. I hoped my braking would improve somewhat, really did not get my hopes way up, I just wanted some good braking.

    What I just experienced is beyond my wildest expectations. I have a manual proportioning valve in the cab for the rear brakes, I had it set in the middle, tire pressure on all four is 18psi, at 55mph, I locked the front up.

    Opened the prop valve fully open, tried it again at 60mph, this time all wheels locked up, what was not tied down went flying, including my full cup of tea.

    This mod although expensive, is totally worth it. I can not believe this system can work so well. I will be installing 39.5 Boggers next month, and have no doubt I will be able lock them up also.

    HPIM0921.JPG

    I have front and rear line locks. Those are the gold colored cylinders mounted on the inner fender.

    HPIM0924.JPG

    This pic you can see how I ran the lines to the proportioning valve through the firewall.

    HPIM0925.JPG

    Getting rid of the old vacuum booster was a added bonus to the hydroboost.

    HPIM0921.JPG

    HPIM0924.JPG

    HPIM0925.JPG
     
  2. bigblock72

    bigblock72 1/2 ton status Premium Member GMOTM Winner

    Joined:
    Oct 18, 2005
    Posts:
    1,235
    Likes Received:
    59
    Location:
    American Fork, Utah
    I put hydro boost on my Blazer last week and the improvement is nothing short of incredible. With the vacuum booster it wouldn't lock up the front brakes on dirt using both feet, but now it locks up the rear tires on pavement without even trying, in fact I had to turn the prop valve down quite a bit.
    Hydro boost can be done a little cheaper with some simple fabrication. I'm in to mine about $350 with all new parts except the booster which is reman. My dad did his for just over $100 by using used parts and having new lines made.
     
  3. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

    Joined:
    Nov 23, 2004
    Posts:
    10,453
    Likes Received:
    0
    Location:
    Minnesota
    I've got some 39's on beadlocks all ready to go. Got a set of TSL's I might want? :p:
     
  4. broc944

    broc944 1/2 ton status

    Joined:
    Sep 23, 2005
    Posts:
    1,660
    Likes Received:
    0
    Location:
    Northern Minnesota
    Nope, I am going with internal beadlocks anyway, was worth a try asking though. You want to seperate the tires from the rims?
     
  5. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

    Joined:
    Nov 23, 2004
    Posts:
    10,453
    Likes Received:
    0
    Location:
    Minnesota
    Sorry, if I sold 'em and bought new stuff now, I'd run 16.5's on hummers so if they go, they're gonna go as a unit. You gonna run Stauns?

    End of hijack.
     
  6. broc944

    broc944 1/2 ton status

    Joined:
    Sep 23, 2005
    Posts:
    1,660
    Likes Received:
    0
    Location:
    Northern Minnesota
    Yep, looking for the best price right now, I like the idea of the design locking both beads, and no lock ring to collect mud.
     
  7. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

    Joined:
    Nov 23, 2004
    Posts:
    10,453
    Likes Received:
    0
    Location:
    Minnesota
    Let me know what you come up with. I want a double lock if/when I go to different tires...and by the time you rework hummer rims they get spendy.
     
  8. broc944

    broc944 1/2 ton status

    Joined:
    Sep 23, 2005
    Posts:
    1,660
    Likes Received:
    0
    Location:
    Northern Minnesota
    Internals are not as expensive as I thought, I had to get wider rims anyway. The only downside, if you want to call it a downside is that you do not get the beadlock look.
     
  9. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,178
    Likes Received:
    1,387
    Location:
    E-town baby!
    Vac sucks...:D

    I got hydroboost when the 6.2 went in which was also when the 40's went on. I was amazed to have better braking on the 40's than i ever did on the old 36's (with vac brakes)

    Rene
     
  10. mikey_d05

    mikey_d05 1 ton status GMOTM Winner

    Joined:
    Nov 23, 2004
    Posts:
    10,453
    Likes Received:
    0
    Location:
    Minnesota
    You two stop all this bragging. I have enough stuff to fix before my junk goes back together, I don't want to add another thing to the list. :mad:
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,178
    Likes Received:
    1,387
    Location:
    E-town baby!
    :p: :p:

    Don't you have a girl to dump too Mikey? :whistle:

    Rene
     
  12. Brians89K5

    Brians89K5 1/2 ton status

    Joined:
    Jan 4, 2006
    Posts:
    535
    Likes Received:
    0
    Location:
    Rialto Ca.
    Damn I just went through my ENTIRE break system and am only half happy with the outcome... Maybe I need hydro boost too... Now all I gotta do is sell a kidney or two...

    ~Brian
     
  13. sandawgk5

    sandawgk5 3/4 ton status

    Joined:
    Oct 28, 2003
    Posts:
    6,881
    Likes Received:
    1
    Location:
    Kitsap County PACNORWEST
    Got a quick hijack. My old MC looked just like that and the lines where set up the same way. I put HB on and changed the MC. The new MC had the large line on the rear and the small line on the front so that is how I put mine. Is this backwards? Could this be why my rears lock up and pulse but the front does not? Also it feels as if the front is dragging is there a residual valve in the MC for the drums?


    Ira
     
  14. 1977k5

    1977k5 3/4 ton status Vendor

    Joined:
    May 26, 2003
    Posts:
    9,995
    Likes Received:
    133
    I don't know about all the people jumping on the hydroboost bandwagon. I have one tons with the stock master cylinder and couldn't imagine the brakes needing any more power. I can lock up all 4 wheels at any speed with fairly minimal pedal effort (not standing on the pedal). I think some people vouch for the benefits of hydroboost when their sub-par vacuum setup was the issue. Who knows if my experience is rare or not, just throwing it out there :dunno:
     
  15. mouse

    mouse 1/2 ton status

    Joined:
    Nov 10, 2003
    Posts:
    1,448
    Likes Received:
    0
    Location:
    Great Falls Mt
    After rebuilding my stock stuff a couple of years ago, I wasn't really happy with the braking power. So, I switched to hydroboost. Theres no going back for me.

    Although, now as I prepare to install a hydro-assist steering set up, I worry that I could have some problems.
     
  16. muddybuddy

    muddybuddy 3/4 ton status

    Joined:
    Jan 29, 2004
    Posts:
    8,933
    Likes Received:
    1
    Location:
    Fairfax Station VA
    how much was it for ur aftermarket set up broc? im swappin in a 6.2 soon so im going hydroboost anyways. seein the other options as well :)
     
  17. gmcburb1965

    gmcburb1965 clever user title

    Joined:
    Oct 29, 2005
    Posts:
    61
    Likes Received:
    0
    Location:
    Colorado Springs
    I just grabbed a complete setup from an 80's Chevy diesel plus the master cyl from a mid 90s diesel for $10. I haven't installed it yet but will let you know when I do. My vac brakes are OK and I could stay with them but getting rid of the booster helps to un-crowd the engine bay. If you go the used route make sure you get a complete system including the pedal assembly to ensure proper geometry.
     
  18. Yukon Jack

    Yukon Jack 1/2 ton status

    Joined:
    Jul 25, 2002
    Posts:
    1,984
    Likes Received:
    0
    Location:
    Rose Hill, KS
    broc944 - looks like a great setup you are using. I put a hydroboost setup and hydraulic clutch from a 1989 1 ton on my 69 K20. I had manual brakes so my level of improvement was dramatic. Your setup sure looks clean.
     
  19. k20

    k20 3/4 ton status

    Joined:
    Sep 9, 2001
    Posts:
    5,068
    Likes Received:
    0
    Location:
    Mineral Springs, NC
    On the factory setups, is the pedal assembly different between vac brakes & hydroboost?

    Also, are the brake calipers/wheel cylinders the same between the hydroboost & non-hydroboost trucks?
     
  20. gmcburb1965

    gmcburb1965 clever user title

    Joined:
    Oct 29, 2005
    Posts:
    61
    Likes Received:
    0
    Location:
    Colorado Springs
    This is my first install and I haven't done it yet; but I'm told (by mouse) that the geometry is different at the pedal. Mouse will be checking this later tonight and he will chime in I'm sure.

    I wouldn't think the calipers would be any different between vac and juice; hydraulic pressure looks the same to a brake caliper. Maybe someone else has more info.
     

Share This Page